Wide Band Microwave Noise Measurement System
by Murat Celep In the wide band radiometer, it is necessary to use more than one low noise amplifier (LNA) because of their narrow band characteristic. The change in the gain of the LNAs with […]
RF & Microwave
1mW Power Sensor Calibration with Vector Mismatch Corrections Based on the Direct Comparison Method
by Michael Schwartz Many calibration labs are starting to calibrate power sensors or looking to increase their capabilities and frequency range. In this Metrology 101 we are hoping to help some calibration labs improve their […]
Report of an Interlaboratory Comparison of Phase Noise
by Bart Caswell In 2013 and 2014, the U.S. Army Primary Standards Laboratory piloted a six-laboratory intercomparison (ILC) of phase noise measurements using a Fluke 9640A-LPN signal generator as the test article. The article was […]
New Fluke Calibration Low Phase Noise RF Reference Sources
EVERETT, Wash., Aug. 6, 2014 – Fluke Calibration introduces the 96270A and 96040A Low Phase Noise RF Reference Sources, which simplify RF and microwave calibration systems by replacing many of the instruments and accessories in […]
Metrology 101: The Effect of Cables and Shields on Traceability
by Jesse Morse If a person making a dc or low frequency measurement fails to select the proper cables, or to properly connect the shields the traceability chain for that measurement can be violated. This […]
METROLOGY 101 Article Correction
The Metrology 101 article from the Jul-Sep 2013 issue, “Testing Linearity on the Agilent E441xA Power Sensors,” has been updated online. The upper and lower readings are incorrect in the printed version. An Excel spreadsheet […]
Metrology 101: Testing Linearity on Agilent E441xA Power Sensors
by Michael Schwartz Today’s new high dynamic range power sensors are not built the same as the older generations of sensors. Older generations of power sensors only had a correction table for their frequency response. […]
Verifying 1 mW 50 MHz Power Reference Output SWR
by Charles Sperrazza Verification of the Standing Wave Ratio (SWR) of the 50 MHz 1 mW output power reference is a key step in performing a calibration of a RF power meter. Higher than desired […]